Process of obtaining rosin and turpentine from wood.



O. HOWARD. PROOES OF OBTAXNING ROSIN AND TORPENTINE PROM WOOD.

ABPLIGATION FILED Nov. s, 1912.

nel. of a. reort 2, and a par vacuum is than Specutom ai Ltarrs Patent.

2l, or showing a gass wndw herein.

plicduced in the re'm', for example, by @mf-f nesting he renrt 2, Wh ik@ sucion s i'e of the air pump 8, izx'ox'ez tol femme bis air, as much als possbe from he pores of the Wd, :m from da spaces between the chips. The Sovem: which preferably ,scies sisls of tm'pnne, which may se iightbroezgh ih@ roses therfrom asft-hofoughy possible. BV proper nuanl'pulaton 0f le.v valve 3 thu@ pressm may be caused no fuctuate in the eto 2, for example by gradually raising and. lowering the pflrsure between atmospherc pr'essulc und a pressure of bou 30 muns pressuzs above a'mospherc.' By thus causing bhe pressue to uctuate, he Solvent very horoughy 91' matter imm the chips. une Staa-m fol' heat ing le res is supp 1 'om the boiler 5. @rough the s 2 ami valved comme# 'tion 6. seam exnaufat Gf the jacket is usmed ai: f. The compressed air from the wmp'es'sor 8 passes through a. vessel 9, Whez'e mostufe separatg out as Water, lence houghpipe i0, air heater ll, 'pipes 12 and 13 imn the pipe 14, am] out through the roses The pipe M makes a more o; less tight jonz Wth the pipe 13, boih being mii-ably. apref' their ends, for'this purpose. The ai? passing hmupgn the solvent and chips, Qares' maffe 0; las of the saowen, vapor, which is condensed in he coil l5, and passes through sepaator 1G into the storage receptacle 17. This may be pumped back, by pump 18 and pipe 19 into he reot 2.'

as possible from he chips, it is drawn o' through pipe 20, im@ tank 2l, and the chips maybe reated if necessgy, 'or if dash-ed yvjh a secon-: 'whims of solventn m'er to more compliey exmc the msn.` This treatmen Wil be carried out in substana-y fhe same manner the tzeament above refez'ed izo, and ibis second solution tracts the sGluble hen the solvent has extrachd much' @dsa in Grder hat h@ solvent will thoyfougghly Apermeate eadg dup and exract ih@ resin sul will meier-ably be drawn ofi' 'sepame ronfV juriously atiect the same.

. or logs.

being distilled in order to prevent overheating of this material which would in- The rosin is drawn off from this still through pipe 26, and then cooled and thereby solidified, being then ready for packing and shipment.

` The vapors leaving the still pass through the condenser 27., thence throughiseparator S28, into storage tank 29. From said tank a part of the turpentineA may be pumped back `into storage tank 17 through pipe 3L for use as a solvent, in treating more chips and the remainder drawn oif for shipment.

By means of this process I can obtain a maximum yield of'both turpentine and rosin from the Wood, with a minimum 'of labor and expense. The chips after being thus thoroughly extracted are especially suitable for use in paper or pulp making and con stitute a valuable by-product.

In the appended claims, the expression untreated Wood n eans Wood of the coniferous trees, carrying turpentine, rosin orsiinilar substances, which have not been treated with steam orsolvents.

The expression coniminuted condition is intended to include chips, 4sawdust and similar forms,v as distinguished from boards What l claim is:-

l. A process of extracting the resinous component of coinniinuted, coniferous Wood, which comprises acting upon the untreated Wood with a solvent for said resinous bodies, agitating said solvent While in contactv with said Woodby introducinga plurality of streams of heated air, rn a downward direction, and withdrawing said solvent,

wvith the material dissolved therein at the end ot said extraction;

2. A process of obtaining rosin and volatile. constituents freni coniferouswood,

`Which comprises subjecting said wood in acomminuted condition, "to the action of a vacuum, then. tot-hef action of a solvent of creasing the fluid pressure' in the treating vessel during the action et said solvent.

3. A process of obtaining rosin and vo1a' pressure, agitating the mixture of air-and solvent by introducing air under pressure,

and varying the pressure Within the extracting vessel during said extraction step.

5. A process of obtaining rosin and turpentine from Wood containing the same, which process comprises treatin@ the untreated Wood in a subdivided cond1tion,with

t-urpentine under pressure to obtain an extract of resinous constituents in turpentine,

agitating said turpentine during said treatment, and causing the fluid pressure within the treating vessel to alternately rise and fall during said treatment.

Signed at Washington, D. C. this eighth day of November, A. D. 1912.v

' CHARLES HOWARD.

i Witnesses: l v

BENNETT S. JONES, A. B. Fos'rnn.

es'I

l 45, rosin, and' alternately increaslng and de- 

